This game is HARD!
First, you don't have enough supplies, people, weapons, research, contacts or time. You really are a guerilla against the world. Aliens have more and they don't sit around waiting for some guerilla to defeat them. Also, you can't just stop all the annoying ♥♥♥♥ they throw at you, so you have to choose which hell you prefer. Lastly, your soldiers will die, and when a true veteran, highlevel soldier dies, you will feel it.